add /api/server/note endpoint and support in config TOML

config-full.toml

@@ -10,6 +10,8 @@ webClient = "/path/to/webclient"
 # to return Timing-Allow-Origin headers in response
 # allowTiming = true
 
+note = "you can put anything you want in here and have it available via /api/server/note"
+
 # How new data instance ids are generated.
 # Is one of "random" or "sequential".  If "sequential" can set "start_instance_id" property.
 # Use of "random" is a cheap way to have multiple frontend DVIDs use a shared store without

server/server_local.go

@@ -121,6 +121,7 @@ type serverConfig struct {
 	RPCAddress  string
 	WebClient   string
 	AllowTiming bool
+	Note        string
 
 	IIDGen   string `toml:"instance_id_gen"`
 	IIDStart uint32 `toml:"instance_id_start"`

server/web.go

@@ -106,6 +106,10 @@ const WebHelp = `
 
 	Returns JSON for server properties.
 
+ GET  /api/server/note 
+
+    Returns any value of [server.note] from the configuration TOML.
+
  GET  /api/server/types
 
 	Returns JSON with the datatypes of currently stored data instances.  Datatypes are represented
@@ -517,6 +521,8 @@ func initRoutes() {
 
 	mainMux.Get("/api/server/info", serverInfoHandler)
 	mainMux.Get("/api/server/info/", serverInfoHandler)
+	mainMux.Get("/api/server/note", serverNoteHandler)
+	mainMux.Get("/api/server/note/", serverNoteHandler)
 	mainMux.Get("/api/server/types", serverTypesHandler)
 	mainMux.Get("/api/server/types/", serverTypesHandler)
 	mainMux.Get("/api/server/compiled-types", serverCompiledTypesHandler)
@@ -932,6 +938,11 @@ func serverInfoHandler(w http.ResponseWriter, r *http.Request) {
 	fmt.Fprintf(w, jsonStr)
 }
 
+func serverNoteHandler(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Type", "text/plain")
+	fmt.Fprintf(w, tc.Server.Note)
+}
+
 func serverTypesHandler(w http.ResponseWriter, r *http.Request) {
 	jsonMap := make(map[dvid.TypeString]string)
 	typemap, err := datastore.Types()